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This article is a study guide for ``On the Hausdorff dimension of Furstenberg sets and orthogonal projections in the plane" by Orponen and Shmerkin. We begin by introducing Furstenberg set problem and exceptional set of projections and…

经典分析与常微分方程 · 数学 2024-06-10 Jacob B. Fiedler , Guo-Dong Hong , Donggeun Ryou , Shukun Wu

Dimension interpolation is a novel programme of research which attempts to unify the study of fractal dimension by considering various spectra which live in between well-studied notions of dimension such as Hausdorff, box, Assouad and…

度量几何 · 数学 2025-02-07 Jonathan M. Fraser

This paper provides a new model to compute the fractal dimension of a subset on a generalized-fractal space. Recall that fractal structures are a perfect place where a new definition of fractal dimension can be given, so we perform a…

混沌动力学 · 物理学 2010-07-23 M. A. Sánchez-Granero , Manuel Fernández-Martínez

We apply the theory of Peres and Schlag to obtain estimates for generic Hausdorff dimension distortion under orthogonal projections on simply connected two dimensional Riemannian manifolds of constant curvature. As a conclusion we obtain…

度量几何 · 数学 2018-03-01 Zoltán M. Balogh , Annina Iseli

This is a survey on recent developments on the Hausdorff dimension of projections and intersections for general subsets of Euclidean spaces, with an emphasis on estimates of the Hausdorff dimension of exceptional sets and on restricted…

经典分析与常微分方程 · 数学 2018-01-03 Pertti Mattila

Intermediate dimensions were recently introduced to interpolate between the Hausdorff and box-counting dimensions of fractals. Firstly, we show that these intermediate dimensions may be defined in terms of capacities with respect to certain…

经典分析与常微分方程 · 数学 2021-05-21 Stuart A. Burrell , Kenneth J. Falconer , Jonathan M. Fraser

This paper contains a comparative study of two families of simple curves drawn in the plane. On the one hand, we have the fractal curves on the unit interval, with self-similar structure, which have associated a Hausdorff dimension. On the…

经典分析与常微分方程 · 数学 2015-04-07 R. Hansen , M. Piacquadio

We construct a continuously differentiable curve in the plane that can be covered by a collection of lines such that every line intersects the curve at a single point and the union of the lines has Hausdorff dimension 1. We show that for…

度量几何 · 数学 2024-01-29 Tamás Keleti , James Cumberbatch , Jialin Zhang

We relate various concepts of fractal dimension of the limiting set C in fractal percolation to the dimensions of the set consisting of connected components larger than one point and its complement in C (the "dust"). In two dimensions, we…

概率论 · 数学 2012-03-08 Erik Broman , Federico Camia , Matthijs Joosten , Ronald Meester

We consider the Assouad dimension analogues of two important problems in geometric measure theory. These problems are tied together by the common theme of `passing to weak tangents'. First, we solve an analogue of Falconer's distance set…

度量几何 · 数学 2020-04-30 Jonathan M. Fraser

In this paper we study multi-parameter projection theorems for fractal sets. With the help of these estimates, we recover results about the size of $A \cdot A+...+A \cdot A$, where $A$ is a subset of the real line of a given Hausdorff…

经典分析与常微分方程 · 数学 2011-06-29 B. Erdoğan , D. Hart , A. Iosevich

Dimension theory lies at the heart of fractal geometry and concerns the rigorous quantification of how large a subset of a metric space is. There are many notions of dimension to consider, and part of the richness of the subject is in…

度量几何 · 数学 2019-09-20 Jonathan M. Fraser

We study projections onto non-degenerate one-dimensional families of lines and planes in $\mathbb{R}^{3}$. Using the classical potential theoretic approach of R. Kaufman, one can show that the Hausdorff dimension of at most…

经典分析与常微分方程 · 数学 2014-11-27 Katrin Fässler , Tuomas Orponen

We study the family of vertical projections whose fibers are right cosets of horizontal planes in the Heisenberg group, $\mathbb{H}^n$. We prove lower bounds for Hausdorff dimension distortion of sets under these mappings, with respect to…

度量几何 · 数学 2022-10-11 Terence L. J. Harris , Chi N. Y. Huynh , Fernando Roman-Garcia

This paper contains new results on two classical topics in fractal geometry: projections, and intersections with affine planes. To keep the notation of the abstract simple, we restrict the discussion to the planar cases of our theorems. Our…

经典分析与常微分方程 · 数学 2016-07-27 Pertti Mattila , Tuomas Orponen

In this paper we use the theory of computing to study fractal dimensions of projections in Euclidean spaces. A fundamental result in fractal geometry is Marstrand's projection theorem, which shows that for every analytic set E, for almost…

计算复杂性 · 计算机科学 2021-11-15 Neil Lutz , D. M. Stull

We introduce a new concept of dimension for metric spaces, the so-called topological Hausdorff dimension. It is defined by a very natural combination of the definitions of the topological dimension and the Hausdorff dimension. The value of…

经典分析与常微分方程 · 数学 2015-04-21 Richárd Balka , Zoltán Buczolich , Márton Elekes

We consider several classical results related to the Hausdorff dimension of exceptional sets of orthogonal projections and try to find out whether they have reasonable formulations in terms of packing dimension. We also investigate the…

经典分析与常微分方程 · 数学 2015-05-19 Tuomas Orponen

We study parametrized families of orthogonal projections for which the dimension of the parameter space is strictly less than that of the Grassmann manifold. We answer the natural question of how much the Hausdorff dimension may decrease by…

经典分析与常微分方程 · 数学 2014-10-22 Esa Järvenpää , Maarit Järvenpää , Tamás Keleti

We provide exposition into the field of projection theory, which lies at the intersection of incidence geometry and geometric measure theory. We first give the necessary preliminaries in Chapter 2, focusing on incidences between points and…

经典分析与常微分方程 · 数学 2025-09-30 Paige Bright
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